1]  Conjunctivitis  :  It is caused by virus and bacteria, it is also caused by allergy.

2]  Glaucoma :   narrow or blocked angle of anterior chamber. 

3]  Corneal Ulcer :  Bacteria,virus,fungus  

4]  Iritis :  Endogenous & exogenous causes 

5]  Cataract :  Due to old age, trauma,genetic,nutritional,UV-rays 

6]  Refractive Errors :   Due to small or large eye ball and abnormal curvature of cornea  

7]  Trachoma :  Chlamydia organisms 

8]  Retinopathy :   Affects the retina due to diabetes and hypertension 

9]  Squint :  Refractive error / nerve palsy  

10] Night Blindness : Deficiency of vitamin A/ retinitis pigmentosa 

11] Corneal Opacity :  Injuries to cornea, vitamin A deficiency.